Safety device for elevators.



H. MABTINEAU, SAFETY DEVIGE 1 0B ELEVATORS.

APPLICATION FILED KPR. 28.1908.

If m W m ii: w Z M w v1 "J2 HONORE MARTINEAU, Ol HOLYOKE,l\i[ASSACI-IUSEl".l.S.

SAFETY DEVICE FOR ELEVATORS.

Specification of Letters Patent.

Patented May 25, 1909.

Application filed April 28, 1908. Serial No. 429,646.

To all whom it may concern:

Be it known that I, HoNoRn MARTINEAU, a subject of the King of England,residing at Holyoke, in the county of Hampden and State ofMassachusetts, have invented new and useful Improvements in SafetyDevices for Elevators, of which the following is a specification.

This invention relates to improvements in safety devices for elevatorsand more particularly for freight elevators.

The object of the invention is to provide an attachment or mechanism forfreight elevators, whereby the upward movement of the elevator will beinstantly stopped in case any object carried thereon projects beyond theplatform of the car and would strike the edge of the opening in thefloor through which the car passes and constituting a part of theelevator-shaft.

Broadly, the invention consists in associating with the shipper-rod ofthe elevator, mechanism by which the car during its upward movement willbe instantly locked to the shipper-rod, whereby the mechanism whichraises and lowers the car will be rendered inoperative.

Referring to the drawings forming a part of this application,-Figure lis a perspective view of a freight elevator showing the same about topass through an opening in the floor of a building and with theattachments operatively arranged with relation to the car for operatingthe shipper-rod. Fig. 2 is a transverse sectional view through the shipsper-rod and rack-bar on the line 22 of Fig. 1 looking in the directionof the arrow and before the car is locked to the shipper-rod. Fig. 3 isa view similar to Fig. 2 after the locking engagement of the car and theshipper-rod is effected.

Referring to the drawings in detail,a designates a portion of theflooring of the building provided with the usual elevator-shaft oropening 6. The car shown in the drawing is lhat of a freight elevatorand is designated Secured by bolts or lag-screws to the underside of theflooring a are depending brackets d and al and pivoted to the bracket 01is an elbowlever 6 having the arms f and g, and pivoted to the bracket dis an arm h, the arms 9 and h being connected together by means of a bari.

The arm f has attached to it a cord or chain that passes through aring-shaped opening in the bracket 7c, its other end being attached to afinger m that is rotatably mounted on the shipper-rod n by means of theloose collar 0, that is connected to a coiled spring p, the other end ofthe spring being attached to the collar 1" that is fixed to theshipper-rod n by means ofthe set screw 8. The spring p acts normally tomove the finger m away from the teeth of the rack-bar t that is carriedby the car 0. Located above the collar 0 is another collar a secured tothe rod n by means of a setnut o. This collar is provided with a stop toagainst which a pin r strikes for limiting the outward movement of thefinger m.

The shipper rod a extends the entire height of the building and isloosely mounted in the different floors so that the operator of the carcan raise and lower the same when starting and stopping the car by meansof the usual handle P. The opposite side of the elevator opening isprovided with brackets similar to d and d only one of which is shown,and a cord or chain (1 that extends through the bracket lc is alsosecured to the finger m.

The shipper-rod n is normally held so that the finger m is out ofengagement with the teeth to of the bar t, that is to say in the position shown in Fig. 2.

2 designates an object or piece of freight on the platform of theelevator that is shown projecting beyond the vertical edge y of the car,and in engagement with the under side of the horizontal bar 41. Thecontinued u ward movement of the car will bring t e block or object 2into contact with the bar i thus elevating the arms 9 and 7t and causingthe arm f to draw on the cord or chain j in the direction of the arrow.This action will rotate the finger m against the tension of the springp, by means of the chain j, into locking engagement with the teeth ofthe bar t which will lock the car to the shipper rod, thus elevating thesame and causing the actuation of the usual belt-shipping and drivingmechanism (not shown) so as to stop the car before any damage is done tothe flooring or elevator on account of the object 2 projecting beyondthe edge y of the platform.

After the stopping of the car the operator can of course move theshipper-rod so as to impart a reverse or downward movement to the same,thus permitting the object 2 to be removed as readily understood What Iclaim, is:

1. In combination with an elevator-car, means for starting and stoppingsaid car, said means comprising the usual shipper rod, a

5 locking finger carried by the shipper-rod, a rack carried by said car,and automatically operated means for moving the locking finger intoengagement with the rack.

2. The combination With a shipper-rod,

10 an elevator-car, a finger carried by said rod,

a rack carried by said elevator-car, means for normally retaining thefinger away from the rack, and automatic means for locking the fingerand rack together during the movement of said car, as described.

HONORE MARTINEAU.

Vfitnesses K. CLEMoNs, H. W. BOWEN.

